Theorem 3an6 1258

Description: Analog of an4 553 for triple conjunction. (Contributed by Scott Fenton, 16-Mar-2011.) (Proof shortened by Andrew Salmon, 25-May-2011.)

Assertion

Ref	Expression
3an6	|- ( ( ( ph /\ ps ) /\ ( ch /\ th ) /\ ( ta /\ et ) ) <-> ( ( ph /\ ch /\ ta ) /\ ( ps /\ th /\ et ) ) )

Proof of Theorem 3an6

Step	Hyp	Ref	Expression
1		an6 1257	. 2 |- ( ( ( ph /\ ch /\ ta ) /\ ( ps /\ th /\ et ) ) <-> ( ( ph /\ ps ) /\ ( ch /\ th ) /\ ( ta /\ et ) ) )
2	1	bicomi 130	1 |- ( ( ( ph /\ ps ) /\ ( ch /\ th ) /\ ( ta /\ et ) ) <-> ( ( ph /\ ch /\ ta ) /\ ( ps /\ th /\ et ) ) )

Syntax hints:   /\ wa 102   <-> wb 103   /\ w3a 924

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106

This theorem depends on definitions:  df-bi 115  df-3an 926

This theorem is referenced by:  poxp  5997